447     assert(baseName("file", "file"w.dup) == "file");
448     assert(baseName("dir/file.ext"d.dup) == "file.ext");
453     assert(baseName("dir/subdir/".dup, "subdir") == "subdir");
454     assert(baseName("/"w.dup) == "/");
455     assert(baseName("//"d.dup) == "/");
597     assert(dirName("dir/file"w.dup) == "dir");
598     assert(dirName("dir///file"d.dup) == "dir");
950     assert(extSeparatorPos(".foo".dup) == -1);
951     assert(extSeparatorPos(".foo.ext"w.dup) == 4);
956     assert(extSeparatorPos("dir/file"d.dup) == -1);
960     assert(extSeparatorPos("dir/.foo.ext".dup) == 8);
1011     assert(extension(".foo".dup).empty);
1012     assert(extension(".foo.ext"w.dup) == ".ext");
1154     assert(setExtension("file"w.dup, "ext"w) == "file.ext");
1155     assert(setExtension("file"w.dup, ".ext"w) == "file.ext");
1156     assert(setExtension("file."w, "ext"w.dup) == "file.ext");
1157     assert(setExtension("file."w, ".ext"w.dup) == "file.ext");
1158     assert(setExtension("file.old"d.dup, "new"d) == "file.new");
1159     assert(setExtension("file.old"d.dup, ".new"d) == "file.new");
1164     static assert(setExtension("file"w.dup, "ext"w) == "file.ext");
1165     static assert(setExtension("file.old"d.dup, "new"d) == "file.new");
1256     assert(defaultExtension("file"w.dup, "ext"w) == "file.ext");
1257     assert(defaultExtension("file.old"d.dup, "new"d) == "file.old");
1262     static assert(defaultExtension("file"w.dup, "ext"w) == "file.ext");
1263     static assert(defaultExtension("file.old"d.dup, "new"d) == "file.old");
1431         assert(buildPath("foo/".dup, "bar") == "foo/bar");  in version()
1432         assert(buildPath("foo///", "bar".dup) == "foo///bar");  in version()
1434         assert(buildPath("foo"w.dup, "/bar"w) == "/bar");  in version()
1435         assert(buildPath("foo"w, "bar/"w.dup) == "foo/bar/");  in version()
1437         assert(buildPath(""d.dup, "foo"d) == "foo");  in version()
1438         assert(buildPath("foo"d, ""d.dup) == "foo");  in version()
1439         assert(buildPath("foo", "bar".dup, "baz") == "foo/bar/baz");  in version()
1440         assert(buildPath("foo"w, "/bar"w, "baz"w.dup) == "/bar/baz");  in version()
1451         assert(buildPath(ir("foo/".dup, "bar".dup)) == "foo/bar");  in version()
1452         assert(buildPath(ir("foo///".dup, "bar".dup)) == "foo///bar");  in version()
1454         assert(buildPath(ir("foo"w.dup, "/bar"w.dup)) == "/bar");  in version()
1455         assert(buildPath(ir("foo"w.dup, "bar/"w.dup)) == "foo/bar/");  in version()
1457         assert(buildPath(ir(""d.dup, "foo"d.dup)) == "foo");  in version()
1460         assert(buildPath(ir("foo"w.dup, "/bar"w.dup, "baz"w.dup)) == "/bar/baz");  in version()
1469         assert(buildPath("foo"w, `d:\bar`w.dup) ==  `d:\bar`);  in version()
1481         assert(buildPath(ir("foo"w.dup, `d:\bar`w.dup)) ==  `d:\bar`);  in version()
2414     assert(equal2(pathSplitter("/foo/bar".dup), ["/", "foo", "bar"]));
2417     assert(equal2(pathSplitter("foo/bar"d.dup), ["foo"d, "bar"d]));
2432         assert(equal2(pathSplitter("//foo/bar"w.dup), ["/"w, "foo"w, "bar"w]));  in version()
2449         assert(equal(pathSplitter("/foo/bar".dup), ["/", "foo", "bar"]));
2595     assert(isAbsolute("/foo".dup));  in version()
2604     assert(!isAbsolute("\\"w.dup));  in version()
2605     assert(!isAbsolute("\\foo"d.dup));  in version()